When creating an attribute with a validation rule such as "lch" Or "ls" is it possible for the cell to display the two options when the cell is selected (with the ability to click on one)? Thanks for the help

You can add a combobox style lookup to a field in the table. However the table is really not the place to be interacting with the data and lookups are best avoided in tables.

The interaction by the user should be done in a form.

To go with what has been said, please read this (http://www.mvps.org/access/lookupfields.htm) about lookups at table level.